package org.gcube.dataanalysis.ecoengine.utils;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.gcube.dataanalysis.ecoengine.configuration.AlgorithmConfiguration;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.transform.BasicTransformerAdapter;

public class AliasToEntityOrderedMapResultTransformer extends BasicTransformerAdapter {

		public static final AliasToEntityOrderedMapResultTransformer INSTANCE = new AliasToEntityOrderedMapResultTransformer();

		/**
		 * Disallow instantiation of AliasToEntityOrderedMapResultTransformer .
		 */
		private AliasToEntityOrderedMapResultTransformer () {
			super();
		}

		/**
		 * {@inheritDoc}
		 */
		public Object transformTuple(Object[] tuple, String[] aliases) {
		//linkedhashmap to get table column name in order        
		    Map result = new LinkedHashMap(tuple.length);
		    for ( int i=0; i<tuple.length; i++ ) {
		        String alias = aliases[i];
		        if ( alias!=null ) {
		            result.put( alias, tuple[i] );
		        }
		    }
		    return result;
		}

		/**
		 * {@inheritDoc}
		 */
		public boolean isTransformedValueATupleElement(String[] aliases, int tupleLength) {
		    return false;
		}

		/**
		 * Serialization hook for ensuring singleton uniqueing.
		 *
		 * @return The singleton instance : {@link #INSTANCE}
		 */
		private Object readResolve() {
		    return INSTANCE;
		}
		
		
}